Contact Service Provider error

Remove the SIM card from the device. For steps on how to remove and insert the SIM, head over to the Phones page and select your device. You'll find steps in our how-to guides.

Insert the SIM card, battery, and if necessary, place the cover on the back.

Turn on the device.

Check for the error. If the error message remains, the phone is not recognizing that the SIM card was inserted. If possible, test your SIM card in a known working device, and then contact us for additional support.

Insert SIM or invalid SIM card error

Remove the battery, SIM card, and back cover.

Insert the SIM card, battery, and if necessary, place the cover on the back.

Check for the error. If the error message remains, the phone is not recognizing that the SIM card was inserted. If possible, test your SIM card in a known working device, and then contact us for additional support.

Unregistered SIM error

Make sure your device has signal. If you don't have signal, check out Can't get signal.

Do a manual network selection to try and register on the T-Mobile network. For steps on how to scan for networks, head over to the Phones page and select your device. You'll find steps in our how-to guides.

Check for the error.If you're able to register on our network, the error should no longer appear.

If possible, test your SIM card in a known working device, and then contact us for additional support.

Wrong password error

Turn off the device.

Wait 5 seconds and turn the device on.

Check for the error.

Try using the default security code.

For information on the code, go to the Phones page, select your device, and then look in the how-to guides.

Keep in mind, you get 10 attempts to enter the correct password for blackberry devices. After the 10th attempt, it prompts you to type blackberry, which wipes the device.